TruCrimp Nocking Pliers by OMP.
Solidly made, quality, easy to handle. Gives you control over the brass nocking point so you don’t crimp it on too tight. Very much worth it.
Best nock pliers.
Pricey, but worth it. I don't mind paying extra for a quality tool that doesn't destroy the nock. Also the nock removal feature works like a charm.